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Elements Of Remote Sensing

Elements Of Remote Sensing
The normal altitude of GPS satellite is about

20,200 km
36,100 km
16,200 km
24,400 km

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Elements Of Remote Sensing
The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:

Reflectance
Reflectance factor
Albedo
None of these

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Elements Of Remote Sensing
Electromagnetic spectrum contains:

Infrared rays (wave length < 10⁻⁴ m)
Gamma rays (wave length < 10⁻¹⁰ m)
Ultraviolet rays (wave length < 10⁻⁶ m)
All of these

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Elements Of Remote Sensing
The changes in the reflectivity/emissivity with time, is called:

Spatial variation
Spectral variation
Temporal variation
None of these

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Elements Of Remote Sensing
Coherence of two electromagnetic waves takes place if their phase difference is:

Constant in space
Constant in time and space
Constant in time
None of these

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Elements Of Remote Sensing
The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is :

12
16
24
8

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